package com.koma.watch;

import android.annotation.SuppressLint;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.View;
import com.koma.watch.R;

/**
 * An example full-screen activity that shows and hides the system UI (i.e.
 * status bar and navigation/system bar) with user interaction.
 */
public class FullscreenActivity extends AppCompatActivity {
  /**
   * Whether or not the system UI should be auto-hidden after
   * {@link #AUTO_HIDE_DELAY_MILLIS} milliseconds.
   */
  private static final boolean AUTO_HIDE = true;

  /**
   * If {@link #AUTO_HIDE} is set, the number of milliseconds to wait after
   * user interaction before hiding the system UI.
   */
  private static final int AUTO_HIDE_DELAY_MILLIS = 3000;

  /**
   * Some older devices needs a small delay between UI widget updates
   * and a change of the status and navigation bar.
   */
  private static final int UI_ANIMATION_DELAY = 300;
  private final Handler mHideHandler = new Handler();
  private View mContentView;
  private final Runnable mHidePart2Runnable = new Runnable() {
    @SuppressLint("InlinedApi")
    @Override
    public void run() {
      // Delayed removal of status and navigation bar

      // Note that some of these constants are new as of API 16 (Jelly Bean)
      // and API 19 (KitKat). It is safe to use them, as they are inlined
      // at compile-time and do nothing on earlier devices.
      mContentView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE
          | View.SYSTEM_UI_FLAG_FULLSCREEN
          | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
          | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
          | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
          | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
    }
  };
  private View mControlsView;
  private final Runnable mShowPart2Runnable = new Runnable() {
    @Override
    public void run() {
      // Delayed display of UI elements
      ActionBar actionBar = getSupportActionBar();
      if (actionBar != null) {
        actionBar.show();
      }
      mControlsView.setVisibility(View.VISIBLE);
    }
  };
  private boolean mVisible;
  private final Runnable mHideRunnable = new Runnable() {
    @Override
    public void run() {
      hide();
    }
  };
  /**
   * Touch listener to use for in-layout UI controls to delay hiding the
   * system UI. This is to prevent the jarring behavior of controls going away
   * while interacting with activity UI.
   */
  private final View.OnTouchListener mDelayHideTouchListener = new View.OnTouchListener() {
    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {
      if (AUTO_HIDE) {
        delayedHide(AUTO_HIDE_DELAY_MILLIS);
      }
      return false;
    }
  };


  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_fullscreen);

    mVisible = true;
    mControlsView = findViewById(R.id.fullscreen_content_controls);
    mContentView = findViewById(R.id.fullscreen_content);

    // Set up the user interaction to manually show or hide the system UI.
    mContentView.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View view) {
        toggle();
      }
    });

    // Upon interacting with UI controls, delay any scheduled hide()
    // operations to prevent the jarring behavior of controls going away
    // while interacting with the UI.
    findViewById(R.id.dummy_button).setOnTouchListener(mDelayHideTouchListener);
  }


  @Override
  protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);

    // Trigger the initial hide() shortly after the activity has been
    // created, to briefly hint to the user that UI controls
    // are available.
    delayedHide(100);
  }


  private void toggle() {
    if (mVisible) {
      hide();
    } else {
      show();
    }
  }


  private void hide() {
    // Hide UI first
    ActionBar actionBar = getSupportActionBar();
    if (actionBar != null) {
      actionBar.hide();
    }
    mControlsView.setVisibility(View.GONE);
    mVisible = false;

    // Schedule a runnable to remove the status and navigation bar after a delay
    mHideHandler.removeCallbacks(mShowPart2Runnable);
    mHideHandler.postDelayed(mHidePart2Runnable, UI_ANIMATION_DELAY);
  }


  @SuppressLint("InlinedApi")
  private void show() {
    // Show the system bar
    mContentView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
        | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
    mVisible = true;

    // Schedule a runnable to display UI elements after a delay
    mHideHandler.removeCallbacks(mHidePart2Runnable);
    mHideHandler.postDelayed(mShowPart2Runnable, UI_ANIMATION_DELAY);
  }


  /**
   * Schedules a call to hide() in delay milliseconds, canceling any
   * previously scheduled calls.
   */
  private void delayedHide(int delayMillis) {
    mHideHandler.removeCallbacks(mHideRunnable);
    mHideHandler.postDelayed(mHideRunnable, delayMillis);
  }
}
